The New York Times published an article about the Xuetas on May 7, 2011.  Here is a link to that article:
https://www.nytimes.com/2011/05/07/world/europe/07iht-spain07.html?_r=2&ref=europe?src=ISMR_AP_LI_LST_FB

An article about a genetic disorder that is more prevalent among Xuetes:
http://www.uib.es/digitalAssets/126/126389_1_article3.pdf